Yeah just subscribing doesn't really work. Not fast enough.
The problem is that the GM mods doesn't get moved to the 'C:\Users\'yourname'\Documents\Larian Studios\Divinity Original Sin 2\Mods
The solution is simple:
1. let the subscribe to your campaign
2. send them a 7zip file or winrar file that contains all the mods needed from your documents/mods folder.
3. Make them unpack it into their mods folder.
4. And LOOK! A campaign that loads within a minutes.
